Show Enum-object representation instead of just constant.

[1844144]

Hello, when I am printing ast-tree I need to see what enum class and value are used. For example:
if you are using OR expression - it will display

...
'boolop': 1
...

after my modification it will show:

'boolop': <BoolExprType.OR_EXPR: 1>

.

Small example for select * from some_table where name='Bob' AND lastname='Alice'

[
<RawStmt>
    'stmt': <SelectStmt>
        'targetList': [
            <ResTarget>
                'val': <ColumnRef>
                    'fields': [
                        <A_Star>
                        ]
                    'location': <7>
                'location': <7>
            ]
        'fromClause': [
            <RangeVar>
                'relname': <'some_table'>
                'inh': <True>
                'relpersistence': <'p'>
                'location': <14>
            ]
        'whereClause': <BoolExpr>
            'boolop': <BoolExprType.AND_EXPR: 0>
            'args': [
                <A_Expr>
                    'kind': <A_Expr_Kind.AEXPR_OP: 0>
                    'name': [
                        <String>
                            'str': <'='>
                        ]
                    'lexpr': <ColumnRef>
                        'fields': [
                            <String>
                                'str': <'name'>
                            ]
                        'location': <32>
                    'rexpr': <A_Const>
                        'val': <String>
                            'str': <'Bob'>
                        'location': <37>
                    'location': <36>
                <A_Expr>
                    'kind': <A_Expr_Kind.AEXPR_OP: 0>
                    'name': [
                        <String>
                            'str': <'='>
                        ]
                    'lexpr': <ColumnRef>
                        'fields': [
                            <String>
                                'str': <'lastname'>
                            ]
                        'location': <47>
                    'rexpr': <A_Const>
                        'val': <String>
                            'str': <'Alice'>
                        'location': <56>
                    'location': <55>
                ]
            'location': <43>
        'op': <SetOperation.SETOP_NONE: 0>
]

[lelit]

Interesting, thank you. I will give a better look in the following days.

[lelit]

FYI, in current v3 this is the outcome:

# echo "select * from some_table where name='Bob' AND lastname='Alice'" | pgpp -t
[{'@': 'RawStmt',
  'stmt': {'@': 'SelectStmt',
           'all': False,
           'fromClause': ({'@': 'RangeVar',
                           'inh': True,
                           'location': 14,
                           'relname': 'some_table',
                           'relpersistence': 'p'},),
           'limitOption': {'#': 'LimitOption',
                           'name': 'LIMIT_OPTION_DEFAULT',
                           'value': 0},
           'op': {'#': 'SetOperation', 'name': 'SETOP_NONE', 'value': 0},
           'targetList': ({'@': 'ResTarget',
                           'location': 7,
                           'val': {'@': 'ColumnRef',
                                   'fields': ({'@': 'A_Star'},),
                                   'location': 7}},),
           'whereClause': {'@': 'BoolExpr',
                           'args': ({'@': 'A_Expr',
                                     'kind': {'#': 'A_Expr_Kind',
                                              'name': 'AEXPR_OP',
                                              'value': 0},
                                     'lexpr': {'@': 'ColumnRef',
                                               'fields': ({'@': 'String',
                                                           'val': 'name'},),
                                               'location': 31},
                                     'location': 35,
                                     'name': ({'@': 'String', 'val': '='},),
                                     'rexpr': {'@': 'A_Const',
                                               'location': 36,
                                               'val': {'@': 'String',
                                                       'val': 'Bob'}}},
                                    {'@': 'A_Expr',
                                     'kind': {'#': 'A_Expr_Kind',
                                              'name': 'AEXPR_OP',
                                              'value': 0},
                                     'lexpr': {'@': 'ColumnRef',
                                               'fields': ({'@': 'String',
                                                           'val': 'lastname'},),
                                               'location': 46},
                                     'location': 54,
                                     'name': ({'@': 'String', 'val': '='},),
                                     'rexpr': {'@': 'A_Const',
                                               'location': 55,
                                               'val': {'@': 'String',
                                                       'val': 'Alice'}}}),
                           'boolop': {'#': 'BoolExprType',
                                      'name': 'AND_EXPR',
                                      'value': 0},
                           'location': 42}},
  'stmt_len': 0,
  'stmt_location': 0}]

As you can see, enums now appears as a dictionary with a # key pointing to the enum class name, and both the name and the value are present.

[lelit]

I hope v3 representation is clear enough.

[1844144]

Thanks for your response, yes v3 is enough ср, 28 апр. 2021 г., 8:55 Lele Gaifax ***@***.***>:

…

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